Lightning Aura Components Developer Guide

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Introducing Aura Components
Quick Start
Creating Components
Using Components
Communicating with Events
Actions and Events
Handling Events with Client-Side Controllers
Component Events
Application Events
Event Handler Behavior for Active Components
Event Handling Lifecycle
Advanced Events Example
Firing Events from Non-Aura Code
Events Best Practices
Events Fired During the Rendering Lifecycle
Events Handled in the Salesforce Mobile App and Lightning Experience
System Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
Using JavaScript
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
PDF

Firing Events from Non-Aura Code

You can fire Aura events from JavaScript code outside an Aura app. For example, your Aura app might need to call out to some non-Aura code, and then have that code communicate back to your Aura app once it's done.

For example, you could call external code that needs to log into another system and return some data to your Aura app by firing an Aura event. Let's call this event mynamespace:externalEvent. The external code fires this event when it’s ready to communicate with an Aura app.

var myExternalEvent;
if(window.$A &&
  (myExternalEvent = window.$A.get("e.mynamespace:externalEvent"))) {
    myExternalEvent.setParams({isOauthed:true});
    myExternalEvent.fire();
}